* {
  margin: 0;
}

ul,
ul > li {
  list-style: none;
}

.center {
  display: flex;
  justify-content: center;
  align-items: center;
}

body {
  display: flex;
  flex-direction: column;

  padding: 0 20px;
  height: 100vh;
}

header {
  display: flex;
  justify-content: space-evenly;
  align-items: center;

  margin-top: 10px;

  width: 100%;
  flex-basis: 100px;
  flex-grow: 0;
}

.logo-wrapper {
  width: 30%;
}

.logo-wrapper > img {
  margin-left: 20px;

  width: 100px;
  height: 100px;
}

.pages-nav {
  display: flex;
  justify-content: space-evenly;
  align-items: center;
  flex-grow: 1;

  width: 50%;
}

.pages-nav > div {
  flex-grow: 1;
  display: block;

  height: 50px;

  line-height: 50px;
}

.pages-nav > div:hover {
  cursor: pointer;
  background-color: grey;
}

main {
  display: flex;
  flex-grow: 1;

  margin-top: 40px;
}

article > * {
  margin-bottom: 20px;
}

main > aside {
  flex-basis: 30%;
}

footer {
  text-align: center;
}
